TELESCOPIC CONVERGENCE METER

Designed for measurement of
convergence in mines.

Operating
principle: -

The instrument,
which is portable, measures convergence between hanging and foot-wall.

A 10-turn
potentiometer, fitted with a bobbin and stainless steel PVC covered wire,
connects the top part of the telescopic body to the sliding lower half.
Changes in movement are determined by measuring resistance on the
potentiometer. Readings
can be taken by either a simple multi-meter or by a data logger. Basic
measuring range is 1200mm fully open to 750mm fully closed.